CHEM 1110 Lecture Notes - Lecture 19: Alkali Metal, Oxidation State, Superoxide
24 Mar 2017
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Batteries convert chemical energy into electrical energy by means of oxidation-reduction reactants. Oxidation: loss of electrons by a substance. Reduction: gain of electrons by a substance. Oxidation number: number assigned to each element in a species that is used to keep track of electrons: the oxidation number of each atom in any elemental substance is 0 (zero). Examples: h2, p4, s8, o2, n2, na, mg, al, ga, ge: monatomic ion: oxidation number = ionic charge. Alkaline earth metals: 2+ charge, ____ ox. Aluminum: 3+ charge, _____ ox: oxidation # of combined oxygen is -2. # of oxygen atom in mgo is _____ # of oxygen atom in ch3oh is ____ 3 of oxygen atom in peroxide is -1. 3 of oxygen atom in h2o2 is ____ 3 of oxygen atom in superoxide is -1/2. 3 of oxygen atom in ko2 is ____ 3 of oxygen atom in of2 is +2: oxidation # of combined hydrogen is 1+
